Abe is expected to announce a plan to amend several laws that would allow the Japanese Self-Defense Forces to engage in collective self-defense, that is, military defense of allied countries even when Japan is not directly threatened. This will mark a shift in the role of Japan's military overseas, which is currently limited to non-combat peacekeeping duties under Article 9 of the Constitution. Article 9 reads:

Renunciation of War. Aspiring sincerely to an international peace based on justice and order, the Japanese people forever renounce war as a sovereign right of the nation and the threat or use of force as a means of settling international disputes.

In order to accomplish the aim of the preceding paragraph, land, sea, and air forces, as well as other war potential, will never be maintained. The right of belligerency of the state will not be recognized.

Abe's plan is designed to sidestep the more cumbersome constitutional amendment process. But it has drawn critics: a high-profile group of scholars and writers have denounced the plan, and there's a campaign afoot to get Article 9 (the traditional, pacifist version) on the Nobel Committee's radar screen for the Peace Prize as a way to push back against Abe's reinterpretation.

If successful, Abe's plan would change 60 of practice under Article 9--without a constitutional amendment.